Using a pedometer in a hilly area?

nphillips0124

I use a pedometer to map my runs and give me a more accurate calorie count- however, the area I live in has many, many hills. These hills prevent me from getting a more accurate calorie count, I feel, since I know I burn more than my simple pedometer can tell me.

Any tips or opinions? I'm thinking of adding an extra 10-20 calories per mile to even out my count a bit, but I wanted a little feedback first.